2 Cor 5:16. I've read other interpretations of it but none of them make sense like simply taking it exactly as it's found and as meaning exactly what it says.
Depends on one's approach when studying such things out.
Questions like "well, what was Paul talking about that prompted him to bring that up? What does he continue to talk about? Also, is he referring to one principle or rule of thumb; directltly? Might it be instead, if not also; that he is actually referring to some other principle he is basing that one on?"
It is actually that kind of dynamic that results in different people taking one or another part of the proverbial elephant for the whole, at the expense of seeing the actual whole.
Note the first word.
He is about to base what he is about to say, on a principle...
The first word - "wherefore" - indicates he is about to elaborate further, on a general rule of thumb he has been basing what he has been talking about...on.
2 Corinthians 5:16 Wherefore henceforth know we no man after the flesh: yea, though we have known Christ after the flesh, yet now henceforth know we him no more.
The first principle he is actually basing what he first asserts in that passage is the principle that he has been talking about just before getting to that passage...
The principle of Believers being careful not to put their own needs over that of others - which is the issue of a fleshly viewpoint having been allowed to dominate.
Who does that read like a description of?
The Corinthians.
That is the very issue he has been addressing.
2 Corinthians 5:14 For the love of Christ constraineth us; because we thus judge, that if one died for all, then were all dead: 5:15 And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again.
At the same time, Paul ever having been Paul - ever looking at things through various rules of thumb or operative principles; he cannot help but point out that principle is actually based on a Dispensational distinctive.
Principle One...
2 Corinthians 5:16a Wherefore henceforth know we no man after the flesh:
2 Corinthians 5:14 For the love of Christ constraineth us; because we thus judge, that if one died for all, then were all dead: 5:15 And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again.
Principle Two...
2 Corinthians 5:16b...yea, though we have known Christ after the flesh, yet now henceforth know we him no more.
2 Corinthians 5:17 Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.
One is an issue of the flesh principle.
The other is the Dispensational one that one is based on - on God's NEW Creature.
And I'm sure there are other principles in there.
This principle - of all these principles within one - is what makes just Thirteen Epistles...an ever expansive ocean of endless wonder as to just who this New Creature is, how he operates, and so on...
Or as Paul would later be able to "speak unto as unto spiritual" - the Ephesians- about these things the Corinthians had not yet been able to bear, for their having remained "yet carnal, even" or that is to say, yet "babes in Christ..."
Ephesians 3:14 For this cause I bow my knees unto the Father of our Lord Jesus Christ, 3:15 Of whom the whole family in heaven and earth is named, 3:16 That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man; 3:17 That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love, 3:18 May be able to comprehend with all saints what is the breadth, and length, and depth, and height; 3:19 And to know the love of Christ, which passeth knowledge, that ye might be filled with all the fulness of God. 3:20 Now unto him that is able to do exceeding abundantly above all that we ask or think, according to the power that worketh in us, 3:21 Unto him be glory in the church by Christ Jesus throughout all ages, world without end. Amen.